If this is the case (I haven’t seen that ICANN remit language) ...

I would be surprised if it existed, although of course I'm prepared to be shown I'm mistaken, with paragraph numbers.

The order is about customer-facing ISPs, most of which are only DNS operators to the extent they provide service for their customers.  Some have vanity TLDs like .COMCAST, Google via Google Fiber is a registry, but I'd be rather surprised if the FCC order had any bearing on their registroy or registrar activities.

Regards,
John Levine, johnl@iecc.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly